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Alpha, Beta, and Proxima Centauri

The circle shows the location of Proxima Centauri. At just over one parsec away, it is the closest star to our sun. Sitting in the southern constellation Centaurus, the Centaur, it is most likely gravitationally bound to the bright star on the right: Alpha Centauri. The other very bright star is Beta Centauri, about 100 parsecs (300 light-years) from Earth. Credit: Wikipedia user Skatebiker.